For the audience here at GR, I do not think this is the best tutorial to post.. People won't read the red, trust me. :blink:
If you got a file which is being used, I always try to find out by what program. Then if I know, just close that program by Task Manager. If that doesn't work, just boot in safe mode and delete it from there.
I had a good talk with him over msn. I'm sure he learned from it. Now forget these topics and don't bump them, unless he wants to re- edit them.